Graphic abs
--- Introduction ---

Graphic abs is an exercise concerning the
graphical recognition of functions of one real variable involving absolute
values.

The server will give you the graph of a function f (x), whose expression
will be hidden. You will then be presented a certain number of other graphs,
corresponding to modifications of f (x) such as f (|x|),
|f (x)|, or even |f (x)|+1, etc (see the menu below). And you should cocate the one
which corresponds to one which will be precised in a question.
To give the reply, you can simply click on the graph which you believe to be
the good one.

The exercise can be configured by the following parameters.

Type of variations of the function:

f (|x|), |f (x)| ;

f (|x|), |f (x)| ;

|f (x)|, f (|x|) ;

|f (x)|, f (|x|) ;

f (|x|), |f (x)|, f (|x|)1, |f (x)|1, |f (x)1|.

Numbre of questions in one session:
1,
2,
3,
4,
5,
6,
7,
8
(The score is attributed only at the end of a session.)